IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Rollandite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About RollanditeHide

Formula:
Cu3(AsO4)2 · 4H2O
Colour:
Glass-green
Lustre:
Vitreous
Hardness:
4 - 4½
Specific Gravity:
3.9
Crystal System:
Orthorhombic
Name:
Named in honor of Pierre Rolland (b. 1940), a mineral collector of the Roua mines.
This page provides mineralogical data about Rollandite.


Classification of RollanditeHide

Approved
Approval Year:
1998
First Published:
2000
8.CD.30

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2

Physical Properties of RollanditeHide

Vitreous
Transparency:
Transparent
Colour:
Glass-green
Streak:
Very light green
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{001}
Fracture:
Conchoidal
Density:
3.9 g/cm3 (Measured)    3.80 g/cm3 (Calculated)

Optical Data of RollanditeHide

Type:
Biaxial (-)
RI values:
nα = 1.745 nβ = 1.755 nγ = 1.760
2V:
Measured: 71° , Calculated: 70°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong
Pleochroism:
Non-pleochroic

Chemical Properties of RollanditeHide

Formula:
Cu3(AsO4)2 · 4H2O

Crystallography of RollanditeHide

Crystal System:
Orthorhombic
Twinning:
None observed

Type Occurrence of RollanditeHide

Place of Conservation of Type Material:
Natural History Museum of Geneva, Switzerland
Reference:
Sarp, H., Černý, R. (2000) Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure. European Journal of Mineralogy: 12: 1045-1050.

Synonyms of RollanditeHide

Other Language Names for RollanditeHide

Related Minerals - Nickel-Strunz GroupingHide

8.CD.CastellaroiteMn2+3(AsO4)2·4H2OMon. 2/m
8.CD.05KolbeckiteScPO4 · 2H2OMon. 2/m
8.CD.05MetavarisciteAlPO4 · 2H2OMon. 2/m : P21/b
8.CD.05PhosphosideriteFePO4 · 2H2OMon. 2/m
8.CD.05UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O
8.CD.10MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.CD.10StrengiteFePO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10VarisciteAlPO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.10YanomamiteInAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CD.15ParascoroditeFeAsO4 · 2H2OTrig.
8.CD.20LudlamiteFe2+3(PO4)2 · 4H2OMon. 2/m : P21/b
8.CD.25SterlinghilliteMn3(AsO4)2 · 4H2OTric. 1 : P1

Fluorescence of RollanditeHide

Not fluorescent

Other InformationHide

Notes:
Soluble in HCl
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for RollanditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sarp, H., Černý, R. (2000) Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure. European Journal of Mineralogy: 12: 1045-1050.
Jambor, J.L., Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 767-770.
Mandarino, J.A. (2001) New minerals. The Canadian Mineralogist: 39: 1473-1502.

Internet Links for RollanditeHide

Localities for RollanditeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
France (TL)
 
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
      • Guillaumes
        • Daluis
Sarp, H. and Černý, R. (2000): Rollandite, Cu3(AsO4)2.4H2O, a new mineral: its description and crystal structure. Eur. J. Mineral., 12, 1045-1050. MR 33 (2002), 169
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 24, 2018 00:02:56 Page generated: October 9, 2018 08:52:12
Go to top of page